Water Glass Modification and its Impact on the Mechanical Properties of Moulding Sands

Journal title

Archives of Foundry Engineering




No 2

Publication authors


Innovative materials and foundry technology ; ZnO nanoparticles ; Viscosity ; Wettability ; Cohesion ; Sand strength Rmu

Divisions of PAS

Nauki Techniczne


Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.


The purpose of the presented experiment was to develop an effective water glass modifier. In the conducted research, an attempt was made to determine the effect of modifier addition on the wettability of quartz grains, viscosity and cohesion of binder and strength Rm U of the sand mixture. Water glass modification was carried out with, obtained in electrochemical process [1], colloidal suspension of ZnO nanoparticles in methanol (modifier I) or propanol (modifier II), characterised by a constant molar concentration of c = 0.3 M. It was demonstrated that the addition of a colloidal suspension of ZnO nanoparticles in propanol (modifier II) had a significant effect on wettability of quartz grains improvement without the accompanying increase in binder viscosity. Testing the mechanical properties Rm U of sand mixtures containing modified binder (modifier II) hardened at ambient conditions showed an approximately 28% increase in strength compared with the Rm U of the sand bonded with an unmodified binder.


The Katowice Branch of the Polish Academy of Sciences




Artykuły / Articles


ISSN 2299-2944


Bobrowski (2012), FTIR spectroscopy of water glass - the binder moulding modified by Zno nanoparticles, Metalurgija, 51, 477. ; Kmita (2010), Effect of sodium silicate modification on selected properties of loose self - setting sands of Foundry Engineering, Archives, 10, 93. ; Kmita (2012), Influence of modification of water glass on its viscosity and wettability of the sand matrix of Foundry Engineering spec, Archives, 12, 1. ; Hutera (2011), Modification of water glass with colloidal slurries of metal oxides of Foundry Engineering, Archives, 11, 51. ; Major (2007), High - temperature expansion and knock - out properties of moulding sands with water glass of Foundry Engineering, Archives, 7, 127. ; Bobrowski (2012), Effect of magnesium oxide nanoparticles on water glass structure of Foundry Engineering, Archives, 12, 9. ; Stachowicz (2011), Influence of water - glass grade and quantity on residual strength of microwave - hardened moulding sands Part ofFoundry Engineering, Archives, 11, 1.